drm/atomic: Refuse to add invalid objects to requests

Object and property IDs cannot be zero. Prevent them from being added to
the request stream at all, rather than breaking at commit time.

Signed-off-by: Daniel Stone <daniels@collabora.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>

xf86drmMode.c

@@ -1313,6 +1313,9 @@ int drmModeAtomicAddProperty(drmModeAtomicReqPtr req,
 	if (!req)
 		return -EINVAL;
 
+	if (object_id == 0 || property_id == 0)
+		return -EINVAL;
+
 	if (req->cursor >= req->size_items) {
 		drmModeAtomicReqItemPtr new;